The Teaching and Learning International Survey (TALIS) gathers data about school teaching environments from teachers and school leaders, in close to 50 countries in its most recent cycle. TALIS is a tool to assist educational reformers to improve the quality of teaching. TALIS data is based on the opinions, perceptions, beliefs and accounts of teachers and school leaders, as reported by them in a self-completion questionnaire. This publication, presents an overview of TALIS and covers its origins and context, purpose, measurement objectives, background information collection, target population and sampling methodology, assessment administration, reporting and dissemination and influence
